Dynamic Forms

I'm trying to restructure my contact us form, it used to have radio buttons with a Javascript in the head section of the page. I want to change the selection from radio buttons to a drop down section but I cannot seem to change the code to reflect the change. The code I have now is similar to:

<input type="radio" name="form_type" value="easy"
 onclick="switchDiv('ez');">Easy Example Form

Which is the best way to put this code into this:

<label for='service'>Which service do you require?</label><br />
<select name="service">
<option selected="selected" style="border:1px solid #fff;">Please Select</option>
<option value="ex" style="border:1px solid #fff;">Example</option>
<option value="ex 2" style="border:1px solid #fff;">Example 2</option>
<option value="ex 3" style="border:1px solid #fff;">Example 3</option>
</select>

Thanks in advance!

Edited February 6, 201016 yr by Sam G
added [code] tags